Nonlinear Transient Photovoltaic Response in Al/C60/Au Devices: Control of Polarity with Optical Bias

Abstract

We report fast (nanosecond) transient photovoltaic response and steady-state photovoltage of rectifying Al/C60/Au sandwich devices. The transient photovoltage changes polarity at a critical light intensity, which can be varied and controlled by applying steady-state light as bias. This ability to change the polarity of the transient photovoltaic response and to control the intensity at which the polarity changes sign offers potential for use in applications in the area of fast nonlinear optoelectronic detectors. Applied Physics Letters is copyrighted by The American Institute of Physics.